Ruud
Low Heat Output
Furnace runs but delivers insufficient heat; house never reaches set temperature.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incorrect gas input (low gas pressure), Partially plugged burners, Blower speed too high for heating, Duct leakage or poor insulation
How to Fix / Troubleshooting
Safety: Gas pressure and combustion adjustments must be done by a licensed technician.
Homeowner steps:
- Check filter and registers: Ensure proper airflow by using a clean filter and opening all registers.
- Verify thermostat calibration: Compare thermostat reading to a separate room thermometer. Replace thermostat if significantly inaccurate.
- Inspect ductwork: Look for obvious disconnected or crushed ducts in accessible areas like basements or attics.
- Call technician for gas/combustion check: A Ruud technician should verify manifold pressure, temperature rise, and burner condition.
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Repair Difficulty
Hard
4/5
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